bool QFontEngineMacMulti::canRender(const QChar *string, int len)
{
ATSUSetTextPointerLocation(textLayout, reinterpret_cast<const UniChar *>(string), 0, len, len);
ATSUSetRunStyle(textLayout, style, 0, len);
OSStatus e = noErr;
int pos = 0;
do {
FMFont substFont = 0;
UniCharArrayOffset changedOffset = 0;
UniCharCount changeCount = 0;
e = ATSUMatchFontsToText(textLayout, pos, len - pos,
&substFont, &changedOffset,
&changeCount);
if (e == kATSUFontsMatched) {
pos = changedOffset + changeCount;
} else if (e == kATSUFontsNotMatched) {
break;
}
} while (pos < len && e != noErr);
return e == noErr || e == kATSUFontsMatched;
}
bool SetFallbackFont(FreeTypeSettings *settings, const char *language_isocode, int winlangid, MissingGlyphSearcher *callback)
{
const char *str;
bool result = false;
callback->FindMissingGlyphs(&str);
#if (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5)
if (MacOSVersionIsAtLeast(10, 5, 0)) {
/* Determine fallback font using CoreText. This uses the language isocode
* to find a suitable font. CoreText is available from 10.5 onwards. */
char lang[16];
if (strcmp(language_isocode, "zh_TW") == 0) {
/* Traditional Chinese */
strecpy(lang, "zh-Hant", lastof(lang));
} else if (strcmp(language_isocode, "zh_CN") == 0) {
/* Simplified Chinese */
strecpy(lang, "zh-Hans", lastof(lang));
} else if (strncmp(language_isocode, "ur", 2) == 0) {
/* The urdu alphabet is variant of persian. As OS X has no default
* font that advertises an urdu language code, search for persian
* support instead. */
strecpy(lang, "fa", lastof(lang));
} else {
/* Just copy the first part of the isocode. */
strecpy(lang, language_isocode, lastof(lang));
char *sep = strchr(lang, '_');
if (sep != NULL) *sep = '\0';
}
CFStringRef lang_code;
lang_code = CFStringCreateWithCString(kCFAllocatorDefault, lang, kCFStringEncodingUTF8);
/* Create a font iterator and iterate over all fonts that
* are available to the application. */
ATSFontIterator itr;
ATSFontRef font;
ATSFontIteratorCreate(kATSFontContextLocal, NULL, NULL, kATSOptionFlagsUnRestrictedScope, &itr);
while (!result && ATSFontIteratorNext(itr, &font) == noErr) {
/* Get CoreText font handle. */
CTFontRef font_ref = CTFontCreateWithPlatformFont(font, 0.0, NULL, NULL);
CFArrayRef langs = CTFontCopySupportedLanguages(font_ref);
if (langs != NULL) {
/* Font has a list of supported languages. */
for (CFIndex i = 0; i < CFArrayGetCount(langs); i++) {
CFStringRef lang = (CFStringRef)CFArrayGetValueAtIndex(langs, i);
if (CFStringCompare(lang, lang_code, kCFCompareAnchored) == kCFCompareEqualTo) {
/* Lang code is supported by font, get full font name. */
CFStringRef font_name = CTFontCopyFullName(font_ref);
char name[128];
CFStringGetCString(font_name, name, lengthof(name), kCFStringEncodingUTF8);
CFRelease(font_name);
/* Skip some inappropriate or ugly looking fonts that have better alternatives. */
if (strncmp(name, "Courier", 7) == 0 || strncmp(name, "Apple Symbols", 13) == 0 ||
strncmp(name, ".Aqua", 5) == 0 || strncmp(name, "LastResort", 10) == 0 ||
strncmp(name, "GB18030 Bitmap", 14) == 0) continue;
/* Save result. */
callback->SetFontNames(settings, name);
DEBUG(freetype, 2, "CT-Font for %s: %s", language_isocode, name);
result = true;
break;
}
}
CFRelease(langs);
}
CFRelease(font_ref);
}
ATSFontIteratorRelease(&itr);
CFRelease(lang_code);
} else
#endif
{
#if (MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_5) && !__LP64__
/* Determine fallback font using ATSUI. This uses a string sample with
* missing characters. This is not failure-proof, but a better way like
* using the isocode as in the CoreText code path is not available.
* ATSUI was deprecated with 10.6 and is only partially available in
* 64-bit mode. */
/* Remove all control characters in the range from SCC_CONTROL_START to
* SCC_CONTROL_END as well as all ASCII < 0x20 from the string as it will
* mess with the automatic font detection */
char buff[256]; // This length is enough to find a suitable replacement font
strecpy(buff, str, lastof(buff));
str_validate(buff, lastof(buff), SVS_ALLOW_NEWLINE);
/* Extract a UniChar representation of the sample string. */
CFStringRef cf_str = CFStringCreateWithCString(kCFAllocatorDefault, buff, kCFStringEncodingUTF8);
if (cf_str == NULL) {
/* Something went wrong. Corrupt/invalid sample string? */
return false;
}
CFIndex str_len = CFStringGetLength(cf_str);
UniChar string[str_len];
CFStringGetCharacters(cf_str, CFRangeMake(0, str_len), string);
/* Create a default text style with the default font. */
ATSUStyle style;
ATSUCreateStyle(&style);
/* Create a text layout object from the sample string using the text style. */
UniCharCount run_len = kATSUToTextEnd;
ATSUTextLayout text_layout;
ATSUCreateTextLayoutWithTextPtr(string, kATSUFromTextBeginning, kATSUToTextEnd, str_len, 1, &run_len, &style, &text_layout);
/* Try to match a font for the sample text. ATSUMatchFontsToText stops after
* it finds the first continuous character run not renderable with the currently
* selected font starting at offset. The matching needs to be repeated until
* the end of the string is reached to make sure the fallback font matches for
* all characters in the string and not only the first run. */
UniCharArrayOffset offset = kATSUFromTextBeginning;
OSStatus os_err;
do {
ATSUFontID font;
UniCharCount run_len;
os_err = ATSUMatchFontsToText(text_layout, offset, kATSUToTextEnd, &font, &offset, &run_len);
if (os_err == kATSUFontsMatched) {
/* Found a better fallback font. Update the text layout
* object with the new font. */
ATSUAttributeTag tag = kATSUFontTag;
ByteCount size = sizeof(font);
ATSUAttributeValuePtr val = &font;
ATSUSetAttributes(style, 1, &tag, &size, &val);
offset += run_len;
}
/* Exit if the end of the string is reached or some other error occurred. */
} while (os_err == kATSUFontsMatched && offset < (UniCharArrayOffset)str_len);
if (os_err == noErr || os_err == kATSUFontsMatched) {
/* ATSUMatchFontsToText exited normally. Extract font
* out of the text layout object. */
ATSUFontID font;
ByteCount act_len;
ATSUGetAttribute(style, kATSUFontTag, sizeof(font), &font, &act_len);
/* Get unique font name. The result is not a c-string, we have
* to leave space for a \0 and terminate it ourselves. */
char name[128];
ATSUFindFontName(font, kFontUniqueName, kFontNoPlatformCode, kFontNoScriptCode, kFontNoLanguageCode, 127, name, &act_len, NULL);
name[act_len > 127 ? 127 : act_len] = '\0';
/* Save Result. */
callback->SetFontNames(settings, name);
DEBUG(freetype, 2, "ATSUI-Font for %s: %s", language_isocode, name);
result = true;
}
ATSUDisposeTextLayout(text_layout);
ATSUDisposeStyle(style);
CFRelease(cf_str);
#endif
}
if (result && strncmp(settings->medium.font, "Geeza Pro", 9) == 0) {
/* The font 'Geeza Pro' is often found for arabic characters, but
* it has the 'tiny' problem of not having any latin characters.
* 'Arial Unicode MS' on the other hand has arabic and latin glyphs,
* but seems to 'forget' to inform the OS about this fact. Manually
* substitute the latter for the former if it is loadable. */
bool ft_init = _library != NULL;
FT_Face face;
/* Init FreeType if needed. */
if ((ft_init || FT_Init_FreeType(&_library) == FT_Err_Ok) && GetFontByFaceName("Arial Unicode MS", &face) == FT_Err_Ok) {
FT_Done_Face(face);
callback->SetFontNames(settings, "Arial Unicode MS");
DEBUG(freetype, 1, "Replacing font 'Geeza Pro' with 'Arial Unicode MS'");
}
if (!ft_init) {
/* Uninit FreeType if we did the init. */
FT_Done_FreeType(_library);
_library = NULL;
}
}
callback->FindMissingGlyphs(NULL);
return result;
}
bool QFontEngineMacMulti::stringToCMapInternal(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs,
QTextEngine::ShaperFlags flags, QShaperItem *shaperItem) const
{
//qDebug() << "stringToCMap" << QString(str, len);
OSStatus e = noErr;
e = ATSUSetTextPointerLocation(textLayout, (UniChar *)(str), 0, len, len);
if (e != noErr) {
qWarning("Qt: internal: %ld: Error ATSUSetTextPointerLocation %s: %d", long(e), __FILE__, __LINE__);
return false;
}
QGlyphLayoutInfo nfo;
nfo.glyphs = glyphs;
nfo.numGlyphs = nglyphs;
nfo.callbackCalled = false;
nfo.flags = flags;
nfo.shaperItem = shaperItem;
QVarLengthArray<int> mappedFonts(len);
for (int i = 0; i < len; ++i)
mappedFonts[i] = 0;
nfo.mappedFonts = mappedFonts.data();
Q_ASSERT(sizeof(void *) <= sizeof(URefCon));
e = ATSUSetTextLayoutRefCon(textLayout, (URefCon)&nfo);
if (e != noErr) {
qWarning("Qt: internal: %ld: Error ATSUSetTextLayoutRefCon %s: %d", long(e), __FILE__, __LINE__);
return false;
}
{
const int maxAttributeCount = 3;
ATSUAttributeTag tags[maxAttributeCount + 1];
ByteCount sizes[maxAttributeCount + 1];
ATSUAttributeValuePtr values[maxAttributeCount + 1];
int attributeCount = 0;
tags[attributeCount] = kATSULineLayoutOptionsTag;
ATSLineLayoutOptions layopts = kATSLineHasNoOpticalAlignment
| kATSLineIgnoreFontLeading
| kATSLineNoSpecialJustification // we do kashidas ourselves
| kATSLineDisableAllJustification
;
if (!(flags & QTextEngine::DesignMetrics)) {
layopts |= kATSLineFractDisable | kATSLineUseDeviceMetrics
| kATSLineDisableAutoAdjustDisplayPos;
}
if (fontDef.styleStrategy & QFont::NoAntialias)
layopts |= kATSLineNoAntiAliasing;
if (!kerning)
layopts |= kATSLineDisableAllKerningAdjustments;
values[attributeCount] = &layopts;
sizes[attributeCount] = sizeof(layopts);
++attributeCount;
tags[attributeCount] = kATSULayoutOperationOverrideTag;
ATSULayoutOperationOverrideSpecifier spec;
spec.operationSelector = kATSULayoutOperationPostLayoutAdjustment;
spec.overrideUPP = atsuPostLayoutCallback;
values[attributeCount] = &spec;
sizes[attributeCount] = sizeof(spec);
++attributeCount;
Boolean direction;
if (flags & QTextEngine::RightToLeft)
direction = kATSURightToLeftBaseDirection;
else
direction = kATSULeftToRightBaseDirection;
tags[attributeCount] = kATSULineDirectionTag;
values[attributeCount] = &direction;
sizes[attributeCount] = sizeof(direction);
++attributeCount;
Q_ASSERT(attributeCount < maxAttributeCount + 1);
e = ATSUSetLayoutControls(textLayout, attributeCount, tags, sizes, values);
if (e != noErr) {
qWarning("Qt: internal: %ld: Error ATSUSetLayoutControls %s: %d", long(e), __FILE__, __LINE__);
return false;
}
}
e = ATSUSetRunStyle(textLayout, style, 0, len);
if (e != noErr) {
qWarning("Qt: internal: %ld: Error ATSUSetRunStyle %s: %d", long(e), __FILE__, __LINE__);
return false;
}
if (!(fontDef.styleStrategy & QFont::NoFontMerging)) {
int pos = 0;
do {
ATSUFontID substFont = 0;
UniCharArrayOffset changedOffset = 0;
UniCharCount changeCount = 0;
e = ATSUMatchFontsToText(textLayout, pos, len - pos,
&substFont, &changedOffset,
&changeCount);
if (e == kATSUFontsMatched) {
int fontIdx = fontIndexForFontID(substFont);
for (uint i = 0; i < changeCount; ++i)
mappedFonts[changedOffset + i] = fontIdx;
pos = changedOffset + changeCount;
ATSUSetRunStyle(textLayout, engineAt(fontIdx)->style, changedOffset, changeCount);
} else if (e == kATSUFontsNotMatched) {
pos = changedOffset + changeCount;
}
} while (pos < len && e != noErr);
}
{ // trigger the a layout
Rect rect;
e = ATSUMeasureTextImage(textLayout, kATSUFromTextBeginning, kATSUToTextEnd,
/*iLocationX =*/ 0, /*iLocationY =*/ 0,
&rect);
if (e != noErr) {
qWarning("Qt: internal: %ld: Error ATSUMeasureTextImage %s: %d", long(e), __FILE__, __LINE__);
return false;
}
}
if (!nfo.callbackCalled) {
qWarning("Qt: internal: %ld: Error ATSUMeasureTextImage did not trigger callback %s: %d", long(e), __FILE__, __LINE__);
return false;
}
ATSUClearLayoutCache(textLayout, kATSUFromTextBeginning);
return true;
}
